Abstract
A beam telescope as one of the most important and often requested test beam equipment provides particle tracking to test beam users. At the DESY II test beam facility, a new beam telescope called Lycorisbased on a microstrip sensor has been designed to address the user demands for momentum measurement in a 1T solenoid magnet or large area tracking with limited space (3.5cm between the potential user device and the magnet inner wall). Lycorisis designed to provide a high-precision resolution of at least ∼10µm along the bending direction, and a large active area of 10×10cm2 to cover at least 90% of the beam particles at energies of 1-6GeV. The microstrip sensor was originally designed for the Silicon Detector (SiD) at the International Linear Collider (ILC), which adopted a hybrid-less design, i.e. a second metallization layer is used to route signals from strips to the bump-bonded ASIC, and from the ASIC to a wire-bond pad to the outside. This hybrid-less arrangement eliminates the need for a complex hybrid design, and its functioning is first-time tested in this project. The performance of the sensor modules was firstly tested in the lab then at the DESY II test beam facility in August/September 2018, and the results will be presented here. In addition, a summary will be given at the end with an overview of the ongoing test beam campaign of the Lycorisprototype in February 2019.
Highlights
Test beam and irradiation facilities are the key infrastructures for research in high-energy physics detectors, and a beam telescope is one of the most important test beam infrastructure for 5 particle tracking
At the DESY II test beam facility [1], there has been the request by the user community, to install an external beam telescope inside the PCMAG 1 T solenoid, providing precise tracks covering a large area and at the same time fitting into the small area (∼3.5 cm) between the potential device 10 under test (DUT) and the inner wall of the magnet
A six-layer beam telescope named Lycoris has been designed with two arms of three layers each, and each layer consists of two microstrip sensors side-by-side along the magnetic field
Summary
Test beam and irradiation facilities are the key infrastructures for research in high-energy physics detectors, and a beam telescope is one of the most important test beam infrastructure for 5 particle tracking. KPiX digitizes signals from 920 strips with a 13-bit ADC, A preliminary average noise level of ∼0.5 fC is determined from serializes and sends out data through the second metallization 75 the distribution of the RMS of all the channels’ response in a 35 layer to a wire-bonded Kapton cable, see Fig. 2. The KPiX chip employs a power cycle gust/September 2018 This was the first sensor module test design, i.e. the chip will receive a power-on pulse to be ac- 80 beam qualification campaign and the two ASICs were tested tive for a certain period of time called acquisition cycle, separately. Two scintillators installed between the secondary collimator and the sensor module, feed coincidence signals to the KPiX readout system as an external trigger source
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